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That video is people going out of there way to make a scene. All you have to do is ring them, fill in an form, or let them know online you don't watch broadcast TV, or live streaming of broadcast television. Then they leave you alone unless they have a reason to suspect you're lying.
YouTube is a fruitful source of confirmation bias for conspiracy theorists
Also not all of the license fee goes to the BBC, some of it also gets split between all the other terrestrial broadcasters.
Do you have any evidence of this? Channel 4 receives funding from the government, but it is not sourced from the licence fee.
And TBH it's more like a toll than a tax.
In January 2006 the BBC license fee was
reclassified from being a service charge to a tax.
One consequence of this was that the BBC itself was moved from being a public non-financial corporation to a central government body.